Dust Mite
Scientific Name: Dermatophagoides spp. (e.g., Dermatophagoides pteronyssinus or Dermatophagoides farinae)
Order & Family: Order Sarcoptiformes, Family Pyroglyphidae
Size: Microscopic; typically 0.2 to 0.3 millimeters in length. They are barely visible or invisible to the naked eye.
Natural Habitat
Found almost exclusively in human dwellings, particularly thriving in soft furnishings like mattresses, pillows, carpets, and upholstered furniture where dead skin cells accumulate and humidity is moderate to high.
Diet & Feeding
Detritivores that primarily feed on dead skin scales (dander) shedding from humans and pets, as well as microscopic fungi and bacteria associated with decomposing skin.
Behavior Patterns
They do not bite or burrow. They are photophobic (afraid of light) and tend to bury themselves deep in fabrics. Their populations explode in high humidity environments (above 50% relative humidity).
Risks & Benefits
Risks: A major source of indoor allergens. Their feces and decaying body parts contain proteins that can trigger allergic reactions (sneezing, runny nose, itchy eyes) and asthma attacks in sensitive individuals. Benefits: They play a role in the natural decomposition of organic matter (skin cells), though this is unpleasant in a home environment.
Identified on: 2/27/2026